<template>
  <div>
    <van-list
      v-model="loading"
      :finished="finished"
      finished-text="我是有底线的"
      @load="onLoad"
    >
      <van-cell v-for="item in list" :key="item" :title="item" />
    </van-list>
  </div>
</template>
<script>
import axios from 'axios'
export default {
  data () {
    return {
      list: [],
      loading: false,//这是加载状态，比如说下拉默认会变成true，加载结束为false
      finished: false,//如果是false则还能继续拉，为true则代表见底了，不允许拉了
    };
  },
  methods: {
    onLoad () {
      // 异步更新数据
      // setTimeout 仅做示例，真实场景中一般为 ajax 请求
      // setTimeout(() => {
      //   for (let i = 0; i < 10; i++) {
      //     this.list.push(this.list.length + 1);
      //   }

      //   // 加载状态结束
      //   this.loading = false;

      //   // 数据全部加载完成
      //   if (this.list.length >= 40) {
      //     this.finished = true;
      //   }
      // }, 1000);

      setTimeout(() => {
        for (let i = 0; i < 40; i++) {
          this.list.push(this.list.length + 1)
        }
        this.loading = false
        if (this.list.length > 40) {
          this.finished = true
          return
        }
      }, 3000)

    },
  },

};
</script>
<style lang='less'  scoped>
</style>
